43977984139 has 2 divisors, whose sum is σ = 43977984140. Its totient is φ = 43977984138.

The previous prime is 43977984103. The next prime is 43977984157. The reversal of 43977984139 is 93148977934.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43977984139 is a prime.

It is not a weakly prime, because it can be changed into another prime (43977988139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21988992069 + 21988992070.

It is an arithmetic number, because the mean of its divisors is an integer number (21988992070).

Almost surely, 2^43977984139 is an apocalyptic number.

43977984139 is a deficient number, since it is larger than the sum of its proper divisors (1).

43977984139 is an equidigital number, since it uses as much as digits as its factorization.

43977984139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41150592, while the sum is 64.

The spelling of 43977984139 in words is "forty-three billion, nine hundred seventy-seven million, nine hundred eighty-four thousand, one hundred thirty-nine".